VOOZH about

URL: https://www.ldoceonline.com/dictionary/activate

⇱ activate | meaning of activate in Longman Dictionary of Contemporary English | LDOCE

👁 Go back to the home page
👁 Go back to the home page
English

activate

From Longman Dictionary of Contemporary Englishactivateac‧tiv‧ate /ˈæktɪveɪt/ verb [transitive] technical SWITCH ON OR OFFto make an electrical system or chemical process start working OPP deactivate Cooking fumes may activate the alarm. The yeast’s growth is activated by sugar and warmth. —activation /ˌæktəˈveɪʃən/ noun [uncountable]RegisterIn everyday English, people usually use set off rather than activate when talking about electrical systems:Someone has set off the smoke alarm again.→ See Verb tableExamples from the Corpusactivate• The manufacture of chlorophyll in plants is activated by sunlight.• The process is activated by sunlight.• Melanin producing cells in our bodies are activated by ultraviolet light from the sun and can have a protective effect.• In certain rare circumstances, these vaccines could activate disease.• To be completely safe, he activated his automatic call-signal which would be picked up on the ground.• The different ways in which superantigens activate T cells casts light on the pathogenesis of infectious disease.• The smoke activated the sprinkler system.• Then, their ears protected against the piercing whine, they activated the suction pump.• Room keys activate the temperature controls and turn on an entry light, so guests never enter a dark room.• Baking powder contains its own built-in acid, so it can be activated with just heat and liquid.
Exercises
Pictures of the day
What are these? Click on the pictures to check.

Explore topics

See all topics
Word of the day interfere to deliberately get involved in a situation where you are not wanted or needed
Verb table
activate
Simple Form
Present
I, you, we, theyactivate
he, she, itactivates
> View More
Past
I, you, he, she, it, we, theyactivated
Present perfect
I, you, we, theyhave activated
he, she, ithas activated
Past perfect
I, you, he, she, it, we, theyhad activated
Future
I, you, he, she, it, we, theywill activate
Future perfect
I, you, he, she, it, we, theywill have activated
> View Less
Continuous Form
Present
Iam activating
he, she, itis activating
> View More
you, we, theyare activating
Past
I, he, she, itwas activating
you, we, theywere activating
Present perfect
I, you, we, theyhave been activating
he, she, ithas been activating
Past perfect
I, you, he, she, it, we, theyhad been activating
Future
I, you, he, she, it, we, theywill be activating
Future perfect
I, you, he, she, it, we, theywill have been activating
> View Less